Congrats - you caused me to create an account to reply, due to the sheer density of your incorrectness.

- First, the LTV was not Marx's idea. Adam Smith held the same view, as did many many others during this era. Marx refined this idea, but there's nothing about your point that is unique to his version of it.

- Second, while LTV is not widely used today, this is not because it was "completely disproven" (can you cite anything to back this claim up?). It is because economics shifted to a different paradigm based on marginal utility. These two frameworks operate at different levels of abstraction and address different aspects of the price of goods. There is actually empirical evidence of a correlation between the cost of a good and the cost of the labour, at an aggregate level.

- Third, Marx explicitly differentiated between _value_ and _price_. LTV deals with value exclusively (in other words, what happens when externalities impacting price are accounted for). He would have had no issue accepting that externalities impacting supply and demand would impact price.

The final irony of your comment is that the commenter's claim that you are incorrectly analysing is actually also fully defensible under your (presumably) neoclassical view of economics. In competitive markets, reduced production costs lead to reduced equilibrium prices as competitors undercut each other. The proposition that in the long run, under competition, price tends toward cost is a standard result in microeconomics. The idea that "you charge the maximum the customer is willing to pay" only holds without qualification in monopoly or monopolistic competition with strong differentiation, which are precisely the conditions that increased software supply would erode.